Determination of overcurrents and short circuit currents
In a heating system a motor-driven pump with a power of 200 kW, cos φ = 0.88, η = 0.93 is connected through an overhead cable with 1= 45 m (Figure 1).
Step by step calculation of overload and short circuit currents (photo credit: oempanels.com)
Let’s see the calculation of the following:
- Operating current
- Overload protection
- Voltage drop
- Protection by cut-off
- Short circuit protection
- Overcurrent relay
- Direct starting
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